Safety appliance for engine-governors.



H. R. ROCKWELL. SAFETY APPLIANCE FOR ENGINE GOVERNORS.

APPLICATION FILED MAYSl, 1910.

' Patented Jan. 10, 1911.

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APPLICATION FILED MAY 31, 19101 Patented Jan. 10, 1911.

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UNITED STATES PATENT OFFICE.

HUBER/1 R. ROCKWELL, 0F MOUNT VERNON, ILLINOIS, ASSIGNOR OF ONE-HALF TOTHOMAS S. BOSWELL, OF MOUNT VERNON, ILLINOIS.

SAFETY APPLIANCE FOR ENGINE-GOVERNORS.

To all whom it may concern:

Be it known that I, HUBERT R. ROCKWELL, a citizen of the United States,residing at Mount Vernon, in the county of Jefferson and State ofIllinois, have invented certain new and useful Improvements in SafetyAppliances for Engine-Governors; and I do declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to safety appliance attachments for enginegovernors and has for its primary object to provide means whereby theengine may be automatically stopped at any desired time.

Another object of my invention is to provide means whereby the admissionof steam or other motive power to the engine may be stopped orcontrolled by an operator some distance from the engine or in some otherportion of the building in which the engine is located.

A further object of my invention is to provide an attachment for agovernor of any desired make that may be connected to or disconnectedfrom said governor at the will of the operator.

A still further object of my invention is to provide a safety devicewhereby the safety attachment may be disconnected from the governor byelectrical or other suitable means extending to different portions ofthe building in which the engine is located.

With the foregoing and other objects in view, the invention consists ofcertain novel features of construction,combination and arrangement ofparts as will be more fully described and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a side elevation of myimproved safety attachment connected to a Pickering governor. Fig. 2 isa side elevation showing the safety appliance disconnected from thegovernor. Fig. 3 is an elevation of the same looking at right angles toFig. 2. Fig. 4 is a side elevation of my improved safety applianceactuated by a different form of operating means. Fi 5 is a horizontalsectional View on the line 5-5 of Fig. 4-

Specification of Letters Patent.

Application filed May 31, 1910.

Patented Jan. 10, 1911.

Serial No. 564,286.

The same reference characters indicate corresponding parts throughoutthe several vlews.

Referring to the drawings, A designates a governor of any desired type,supported upon the governors staff B and having the usual governor rod Gconnected therewith. Extending from the governor staff B, adjacent itslower extremity is an apertured bracket 1, in which is pivotally mountedthe rock shaft 2. Suitably fixed upon the rock shaft 2, adjacent oneend, is the usual rocker-arm 3 having pivotally secured to its oppositeends, as indicated at 4, the camrods or links 5 adapted, upon therocking of said arm 3, to suitably move the cams 6 to adjust the valveopenings of the steam inlet Valves in the well known or any preferredmanner.

Secured upon the rock shaft 2 adjacent its opposite end is a slottedlink 7 preferably constructed as shown, of an elongated hub portion 8provided with radially extending arms 9 and 10, at the outer end of oneof which, as 10, is provided the arm or branch 11 having a curved slot12 suitably formed therein. The hub portion 8 is reduced, as at 13, andloosely mounted upon said reduced portion is a crank-arm 11,111 theouter end of which is carried a latch-pin 15 adapted to project onopposite sides from the crank-arm, extending on one side through theslot 12 in the link 7. The governor rod 0 is pivotally secured to thelatchpin 15 on the opposite side of the crankarm 11.

Pivoted intermediate its ends upon the arm 11 of the link 7, is a latchmember 16 provided with a hook or catch 17 at one end, said catch beingadapted to fit over or engage the projecting end of the latch-pin 11extending through the slotted link 7 as clearly shown in Fig. 1. At itsopposite end the latch-member 16 is pivotally connected to the link 18,which intermediate its ends is enlarged as at 19, and provided with alongitudinally extending guide-slot 20, adapted to surround a laterallyprojecting guide-pin 21 carried by the radial arm 9 of the link 7.Suitable means, as the eye 22, is formed on the link 18 to connect thesame to the operating mechanism for throwing or actuating the governorattachment.

operating mechanism, but it is to be under stood that any other suitablemeans, as for example, that illustrated in Figs. 1 and 5, may beemployed to operate the safety attachment and that electricity,compressed air or other preferred means may be employed to actuate orstart into operation the operating mechanism. larly to Figs. 1, and 3,the operating mechanism comprises a cord, wire, or like flexibleelement- 23, connected at one end to the link 18, and adapted to passover a guidepulley and at its opposite end is detachably connected witha weight 26, the arm 27 of which is provided with extending pin or lug28. The bracket 25, as herein shown, is provided with an aperture 29adapted to guide the flexible cord To support the weight 26 in anelevated position, at which time the flexible cord 23 is slackened, asshown in Fig. 1, a suitable lever 30 is fulcrumed intermediate its ends,as at 31, and at one end is provided with a hook 32 adapted to engagethe laterally projecting pin or lug 28. The opposite end of the lever 30is adapted to cooperate with a catch carried by the armature \Vhen thisarmature is attracted to the magnet 36, by closing the circuit indicatedat 87, through pushing upon the button or like switch device 38, the endof the lever 30 is released from the catch 31 and swings up- "ardly,disengaging the hook from the weight rod 27, and allowing the weight todescend to release the latch member 16 from the latch pin 15. As theweight descends, the slack in the flexible cord 23 is taken up and thepull exerted upon the link 18, which rocks the latch member 16 upon itspivot, disengages the hook 17 from the latch-pin 1:), which releases thegovernor rod and the crank-arm lit: from the link 7. The furthermovement of the weight 26 serves to rock the rocker-arm 8, and adjustthe cams 6 through the cam rods to close the inlet valves of the engine.

I11 Figs. 4 and 5 is illustrated a means whereby the safety appliancemay be actuated by the employment of compressed air or like fluid, thepitman 40 being eonnectcd at one end to the link 18 and at the other endto the piston rod 4C1, adapted to be moved within the cylinder 42, uponthe introduction of compressed air to said cylinder through the supplypipe 13. It is de signed that suitable branch pipes 44: extend todifferent floors of the building in which the engine is located, or thatsuitable valve operating mechanism be positioned so that the valve toadmit the compressed air to the cylinder 42 may be opened from anyportion of the building.

Referring particua laterally It will be anarent from the fore oin D D 3description that when the latch member 16 In Figs. 1. 2 and is shown oneform of in engagement with the latch pin 15, the crank arm 17ito whichthe governm' rod U is connected, will be locked to the slotted linkwhich is secured upon the same shaft 2 which carries the rocker arm Inthis way, upon the movement of the governor rod, the crank arm 11, link7, and rocker arm 3, will be moved together to open or close the steaminlet valves. \Vhen, however, it is desired to entirely stop the engineth e operating means is suitably set in motion to release the latchmember 16 from the latch-pin 15, whereupon the rocker arm may be swunginto any desired position without in any way affecting the movement ofthe governor or the governor rod.

From the foregoing description taken in connection with the accompanyingdraw ings, the construction and operation of the invention will bereadily understood without requiring a more extended explanation.

Various changes in the form, proportion and the the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages as defined in the appended claims.

Having described my invention what. I claim as new is:

1. In a device of the character described, an engine governor having agovernor rod, a shaft and a rocker arm fixed thereon, a sleeve securedon said shaft having right angularly disposed arms formed on one end,one of said arms having an upwardly curved slotted end, a crank armmounted to rotate on said sleeve connected to said governor rod, a pincarried by said arm movable in the slot in the end of the arm on saidsleeve, a latch member adapted to engage said pin, a movable connectionbetween said member and the other arm on said sleeve, and means fordisconnecting the latch member and pin and rotating said shaft androcker arm.

2. In a device of the character described, an engine governor having agovernor rod and a rocker arm, a slotted link connected to said arm andhaving angularly disposed arms, a crank arm independently movable ofsaid rocker arm and link, a pin carried by the crank arm extendingthrough the slot of said link, a latch member pivoted upon said link toengage said pin, a. link pivoted to said latch member and movablyconnected to one of the arms of said slotted link, and electricallyoperated means connected to said last named link to disengage the latchmember and pin and rotate said rocker arm.

In a device of the character described, an engine governor having agovernor rod and a rocker arm, a slotted link connected to the rockerarm, a crank arm loosely mounted upon said link and connected to thegovernor rod, a pin carried by the crank arm and adapted to extendthrough the slotted link, a latch member pivoted upon the slotted linkand adapted to engage said pin, and means for disengaging the latchmember and pin at any desired time, said means comprising a flexibleelement connected to the latch member, a weightsecured to said flexibleelement, a lever adapted to support the weight in an elevated positionand electrical means adapted to release said lever 10 to allow theweight to fall.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

HUBERT R. ROCKWELL. \Vitnesses L. E. MAYFIELD, P. J. GARRISON.

